3Com MSR 50 X25 queue-length, Syntax x25 queue-length queue-length Undo x25 queue-length, 453

453

By default, no PVC is created. When creating such a PVC, if you do not set the relevant attributes for the PVC, its flow control parameters will be the same as that of the X.25 interface (the flow control parameters on an X.25 interface can be set by the x25 packet-sizeand x25 window-sizecommands).

As one corresponding address mapping is created along with the PVC, it is unnecessary (or impossible) to establish an address mapping first before creating PVCs.

Before creating PVCs, you should first enable the PVC channel range. The range is between 1 and the latest unprohibited channel PVC number minus 1 (including 1 and the lowest PVC number minus 1). Naturally, if the lowest PVC number is 1, the PVC section will be disabled. The following table shows some typical PVC ranges.

Table 68 PVC channel ranges for some typical configurations

	Incoming-only	Two-way channel	Outgoing-only
PVC channel range	channel range	range	channel range
Disabled	[0, 0]	[1, 1024]	[0, 0]
[1, 9]	[0, 0]	[10, 24]	[0, 0]
Disabled	[1, 10]	[15, 30]	[0, 0]
[1, 4]	[5, 10]	[15, 25]	[30, 32]
[1, 19]	[0, 0]	[0, 0]	[20, 45]
[1, 4094]	[0, 0]	[0, 0]	[4095, 4095]

Example # Configure the link layer protocol on the interface Serial 2/0 as X.25, enable PVC channel range, and set two PVCs.

<Sysname> system-view [Sysname] interface serial 2/0 [Sysname-Serial2/0] link-protocol x25

[Sysname-Serial2/0] x25 vc-range bi-channel 8 1024

[Sysname-Serial2/0] x25 pvc 2 ip 202.38.168.1 x121-address 20112451 broadcast packet-size 512 512

[Sysname-Serial2/0] x25 pvc 6 ip 202.38.168.3 x121-address 20112453 broadcast window-size 5 5

x25 queue-length

Syntax x25 queue-length queue-length

undo x25 queue-length

View Interface view

Parameter queue-length: Queue length in packets, ranging from 0 to 9999. The queue-lengthof 0 indicates sending no packets.

Description Use the x25 queue-lengthcommand to set the data queue length for X.25 VC.

Use the undo x25 queue-lengthcommand to restore the default.